• Since September 2012, Professor in Hydrology, Meteorological Institute, Bonn University; Research Topic Leader “Integrated Modeling of Terrestrial Systems”, Agrosphere Institute (IBG-3), Research Centre Jülich, Germany

• September 20011 - August 2012, Senior Computational Geoscientist, Basin Modeling & Inversion, Shell Global Solutions International BV, Rijswijk, The Netherlands

• July 2007 - August 2011, Scientist; Meteorological Institute, Bonn University, Germany

• June 2005 – June 2007, Physicist; Atmospheric, Earth, and Energy Sciences Department, Lawrence Livermore National Laboratory, USA

• January, 2004 – June 2005, Postdoctoral Researcher; Environmental Science Division, Lawrence Livermore National Laboratory, USA

• August 2003, Ph.D. (Geology – Hydrogeology), University of Nebraska – Lincoln, USA
  

Concentrations: Experimental and Theoretical Aquifer Hydraulics, Surface–Groundwater Interactions, Watershed Hydraulics
Dissertation: Stream-Aquifer Interactions Under Pumping Conditions in an Unconfined Aquifer Considering Three-Dimensional Flow, Aquifer Heterogeneity, and Anisotropy
Advisor: Prof. Vitaly A. Zlotnik

• 1998, Diplom (Geology), Center for Applied Geosciences, Tübingen University, Germany
  

Concentrations: Aquifer Characterization, Hydraulic Testing
Thesis: Slug-Tests in Highly Permeable Aquifers
Advisor: Prof. Georg Teutsch

• 2017: MODFLOW & More, Scientific Advisory Committee Member
• 2015: MODFLOW & More, Scientific Advisory Committee Member
• 2012-: Scientific Director, Centre for High-Performance Scientific Computing in Terrestrial Systems, Geoverbund ABC/J
• 2012-2014: Water Resources Research, Associate Editor
• Integrated Hydrologic Model Intercomparison Workshop, Phase 2, Organizer
• 2011-2013: AGU Fall Meeting Program Committee Member, Hydrology
• 2011: Integrated Hydrologic Model Intercomparison Workshop, Phase 1, Co-Organizer
• 2011: MODELCARE, Scientific Advisory Board Member
• 2011: MODFLOW & More, Scientific Advisory Committee Member
• Dec. 2010: AGU, Session on Patterns in Soil Vegetation Atmosphere Systems
• 2010-2013: Computers & Geosciences, Associate Editor
• Nov. 2009: Vadose Zone Journal, Guest Editor
• Dec. 2009: AGU, Session on Advances in Data Acquisition and Integration into Hydrologic Models
• Dec. 2009: AGU, Session on Patterns in Soil Vegetation Atmosphere Systems
• Jun. 2009: Scientific Committee, International Workshop, SFB/TR32
• Jun. 2009: SIAM, Session on Computational Approaches to Coupled Modeling
• Jun. 2009: SIAM, Session on Patterns in Soil Vegetation Atmosphere Systems
• Apr. 2009: EGU, Session on Patterns in Soil Vegetation Atmosphere Systems
• since 2009: Reviewer for NWO and DFG
• Dec. 2007: AGU, Session on Interactions of the Groundwater Land Surface Atmosphere System
• 2005-2010: Groundwater Technical Committee, AGU
• since 2003: Reviewer for international scientific journals

Member of:

• American Geophysical Union (AGU)